28558A Mode Characteristics in Fiber Optics experimental setup has been designed to study the mode characteristics of different fiber optic cables. The two basic types of fiber, Single Mode and Multi Mode can be characterized by measuring Numerical Aperture and the Normalized Frequency (V number) parameter, which guides modes that are allowed to propagate in a particular waveguide structure. When V2.405, the other modes propagate in the wave guide. Using this experimental, the student can easily differentiate between Single Mode and Multi Mode optical fiber cables.

Features

1. Complete set up for Numerical Aperture measurement and V number verification for Single Mode and Multi Mode fiber cables
2. Complete set up for observation of intensity patterns of modes in Single Mode and Multi Mode fiber cables
3. He-Ne LASER Source (650nm; 2mW) with mounting stand and fiber coupler
4. Single Mode & Multi Mode fibers with SMA connectors at each end Features
5. Numerical Aperture measurement / Mode observation screen with holding assembly
6. Optics bench with fiber coupling assembly and customized mechanical fixtures

Object

1. Measurement of Numerical Aperture and verification of V number of a fiber test cable (Single Mode and Multi Mode)
2. Coupling light into a test fiber cable (Single Mode and Multi Mode) and observing the intensity patterns of modes

Technical Specifications

Optical Source

• Source Type : He-Ne LASER source.
• Wavelength : 650 nm
• Output Power : 2mW

LASER to fiber coupler

• Coupling efficiency : >70% for SM fiber > 90% for MM fiber

Single Mode fiber cable

• Connector type : Standard SMA
• Cable type : Step indexed, Glass cable
• Core diameter : 9 microns
• Refractive indices : Core: 1.52; Cladding : 1.48
• Numerical Aperture : 0.13
• Central wavelength : 1300 nm to 1600 nm

Multi Mode POF cable

• Connector type : Standard SMA
• Cable type : Step indexed, Polymer fiber cable (POF)
• Core diameter : 1000 microns
• Refractive indices : Core: 1.49; Cladding : 1.42
• Numerical Aperture : 0.5
• Central wavelength : 650 nm to 1300 nm
• Fiber length : 1.0 m
• Power Supply : 110-220V, ± 10%, 50 / 60 Hz
• Power consumption : 10 VA (approximately)

Dimensions :

• LASER Source : W 95 x H 110 x D 355 mm
• Optics bench : W 40 x H 75 x D 500 mm
• Weight : 4 Kg. (approximately)
• Operating conditions : 0-40 C, 85% RH